diff --git a/src/service/gen_video.py b/src/service/gen_video.py
index 42e5a25..bf1cb27 100644
--- a/src/service/gen_video.py
+++ b/src/service/gen_video.py
@@ -5,6 +5,7 @@ import src.pyJianYingDraft as draft
 from src.pyJianYingDraft import ExportResolution, ExportFramerate
 import config
 import os
+from uiautomation import UIAutomationInitializerInThread
 
 
 def gen_video(draft_url: str) -> (str, str):
@@ -21,15 +22,27 @@ def gen_video(draft_url: str) -> (str, str):
 
     # 从URL中提取草稿ID
     draft_id = helper.get_url_param(draft_url, "draft_id")
-    if (not draft_id) or (draft_id not in DRAFT_CACHE):
+    if not draft_id:
         return "", "无效的草稿URL"
 
-    # 此前需要将剪映打开，并位于目录页
-    ctrl = draft.JianyingController()
+    # 生成输出文件路径
+    outfile = os.path.join(config.DRAFT_DIR, f"{helper.gen_unique_id()}.mp4")
 
-    # 然后即可导出指定名称的草稿, 注意导出结束后视频才会被剪切(重命名)至指定位置
-    ctrl.export_draft("draft_id", "C:\\workspace\\test.mp4")
+    try:
+        with UIAutomationInitializerInThread():
+            logger.info("begin to export draft: %s -> %s", draft_id, outfile)
 
-    logger.info(f"gen video success: %s", os.path.join(config.DRAFT_DIR, draft_id))
-    return draft_url, "视频生成成功"
+            # 此前需要将剪映打开，并位于目录页
+            ctrl = draft.JianyingController()
 
+            # 然后即可导出指定名称的草稿, 注意导出结束后视频才会被剪切(重命名)至指定位置
+            ctrl.export_draft(draft_id, outfile)
+        if not os.path.exists(outfile):
+            # 个别版本剪映不会抛异常，但文件未生成
+            raise RuntimeError("剪映导出结束但目标文件未生成，请检查磁盘空间或剪映版本")
+    except Exception as exc:  # 捕获 COM/剪映/磁盘等所有异常
+        logger.exception("export draft failed: draft_id=%s, error=%s", draft_id, exc)
+        return "", f"导出草稿失败: {exc}"
+
+    logger.info(f"export draft success: %s", outfile)
+    return outfile, "视频生成成功"
diff --git a/src/utils/helper.py b/src/utils/helper.py
index d8c3a19..c68dc3e 100644
--- a/src/utils/helper.py
+++ b/src/utils/helper.py
@@ -2,6 +2,8 @@ from urllib.parse import urlparse, parse_qs
 import os
 import requests
 import mimetypes
+import datetime
+import uuid
 
 
 def get_url_param(url: str, key: str, default=None):
@@ -84,4 +86,13 @@ def download(url, save_dir, filename, limit=30*1024*1024, timeout=300) -> str:
         # 清理可能已部分下载的文件
         if os.path.exists(save_path):
             os.remove(save_path)
-        raise e
\ No newline at end of file
+        raise e
+
+def gen_unique_id() -> str:
+    """
+    生成唯一ID
+    """
+    timestamp = datetime.datetime.now().strftime("%Y%m%d%H%M%S")
+    unique_id = uuid.uuid4().hex[:8]
+    
+    return f"{timestamp}{unique_id}"
\ No newline at end of file